Browse Forums Lighting + Lighting Design Re: Downlight options - going as eco as possible 15Jan 10, 2009 7:44 am 14W CFL is roughly equivalent to a 75W incandescent in overall light output...
The problem is when you try and compare CFL's to low voltage downlights... To get the same working surface light it's around a 3 to 1 ratio required... i.e 3 cfl's where 1 halogen would have done... You do the math, 3 cfl 11w, or 1 35 low voltage halogen.... Hmm I know I'd rather have just 3 lights over my kitchen benchtop than 9!! Electrical Engineer... Don't hold that against me... And keen owner builder... Mainly the building part!! Re: Downlight options - going as eco as possible 16Jan 10, 2009 11:23 am A 15W CFL should give about the same light output as a 50W halogen (or 35W IRC halogen. By CFL I mean one of those lights that is roughly the size of a normal lightbulb.
The problem comes with the GU10 CFL that are the same size as downlights. Due to the very small size you just don't get the efficiency needed. So you end up needing, as chuth mentioned, three times as many lights. If you want the best energy efficient option available today, nothing beats a 15W CFL in a larger than GU10 size. These are one-for-one replacement for halogen downlights. That is, you'll need one for every 4 square metres of floor space (4 for a 4 x 4 m room). Demolition August 2009, Construction Started September 2009, Completed December 2010 You can wash over existing pavers with 10% solution of water and hydrochloric acid, then wash off. The acid will provide for required bond key with new concrete. 1 37485 0 12518 Hi so sorry for the late reply. I already contacted them and they wouldn't tell me instead they tried to get me to talk to one of their home coordinators and I'm not… 2 6680 |