Landscapes - Winter 2013 - (Page 36)

IN CONVERSATION RYAN JAMES WITH JIM SNELGROVE A PRAGMATIST’S GUIDE 3 1 JIM’S PORTRAIT 2 DRAMATIC LIGHTING FOR THE VESSEL, A 5.7M WATER SCULPTURE BY ILAN SANDLER, AT TADDLE CREEK PARK 3 SNELGROVE PRINCIPLES ANNOTATED ON PLAN DRAWING | 1 PORTRAIT DE JIM 2 ÉCLAIRAGE SPECTACULAIRE POUR THE VESSEL, SCULPTURE D’EAU DE 5,7 M SIGNÉE ILAN SANDLER AU PARC TADDLE CREEK 3 PRINCIPES DE SNELGROVE EN ANNOTATION SUR LES PLANS PHOTOS| ART 1+3 RYAN JAMES 2 ILAN SANDLER 1, 2 “I CANNOT TELL you how many landscape architects Jim Snelgrove knows in the Greater Toronto/Golden Horseshoe Areas, but I am confident that it would be easier to list the ones that he does not know,” writes our interviewer Ryan James. W.J. (Jim) Snelgrove is a Partner in MJS Consultants Inc., which specializes in lighting for exteriors of municipal facilities, sports fields, streetscapes and landscapes. The company has completed in excess of one thousand projects in fifty-five different municipalities, working as sub-consultants to landscape architects or as consultants directly to Parks and Recreation Departments. Jim, who is a full member of the Illuminating Engineering Society of North America, has become sensitive to the concerns of the landscape architect during his thirty years in the industry. About the portrait: “Jim suffers the undocumented fate of every family photographer,” writes Ryan James. “He is always on the wrong end of the lens. So we’ve rendered a likeness of Jim and the sensible choice for illumination seemed to be high pressure sodium. Our choice of illumination may not have been the best – and that’s why we call Jim when we need the job done right.” RJ: Many designers insist on pure white light for landscape lighting. Is that your first choice for public spaces? JS: Not at all. There are rare cases where a landscape does require white light, but the vast majority of parks do not. What they require is functional, serviceable, cost-eff ective lighting. This always comes down to high pressure sodium lamps (HPS), which… give you a decidedly yellow light that really does do a terrible job of colour rendering, but we have to look beyond that. 36 LANDSCAPES PAYSAGES RJ: What is your first concern? The construction budget? JS: No. Budgets for capital construction are easier to come by [than budgets for upkeep.] Sure, there’s an annual budget for maintenance too, but this money is always stretched too thin. You’ve got to design for parks that are going to last: a park really should last for 30 years or better. RJ: So the spec always goes to high pressure sodium? JS: HPS lamps are commonly rated for 30,000 hours of service. (One year works out to roughly 4,000 hours.) And the efficacy of that lamp holds fairly consistently across the lifespan. At 30,000 hours, an HPS lamp will still be putting out about 80 percent of the light that it was designed to provide. That’s pretty good. That’s very important too because maintenance crews won’t be coming around to replace that bulb until it’s actually burnt out. RJ: How does that compare with metal halide bulbs? JS: Metal halide bulbs are commonly rated for 20,000 hours of service and you get a white light that does do a good job of colour rendering. Some landscape architects would say that this is the only acceptable light for any park. However, a MH bulb will deteriorate on a steady mortality curve that starts almost immediately. After one year, a bulb simply cannot function as it was intended to. The real problem is that the bulb is still working – just not very well. But the maintenance staff is never going to replace a bulb that is still working.

Table of Contents for the Digital Edition of Landscapes - Winter 2013

Excitable Photons in the Ether | Photons affolés
99 Red Balloons | Light by the Barrel | Something Old, Something New | Cambridge Lights Up | Emptyful
We are Modern Day Lamplighters | Les allumeurs de réverbères modernes ….
The Lights Come Up on 3 Exceptional Landscapes | Les lumières s’allument sur trois paysages exceptionnels
Champ-de-Mars: Shedding Light on History | La lumière au service de l’histoire
To Infinity and Beyond! | Par delà l’infini!
The Gros Morne Challenge | Le défi de Gros-Morne
Cypress Hills: Land of the Living Skies | Cypress Hills : où le ciel s’anime
Urban Parks: To Light or Not to Light? | Parcs urbains : doit-on les éclairer? ….
Lightitude: Lighting Under a Capricious Sky | Lightitude : éclairer sous un ciel capricieux
A Pragmatist’s Guide | Guide pragmatique
Three Riffs on Custom Design | Trois approches du design personnalisé
Seeing Light | Voir la lumière
Representing Landscapes, Ed. Nadia Amoroso.
Collaborators |Collaborateurs
Game Changers | Nouvelle donne : quatre decennies en lumiere

Landscapes - Winter 2013